[et-mgmt-tools] don't show ui dialogs in construction time

[Cole Robinson]

Vitaly Mayatskikh wrote:
> Hi!
> 
> There are calls to hide_all() method after construction of vmm-manager
> and vmm-details dialogs to prevent possible flickering during
> appending more elements to these dialogs. However, it is possible to
> declare visibility property in xml files and to prevent libglade to
> show dialogs automatically.
> 

Thanks, applied:

http://hg.et.redhat.com/cgi-bin/hg-virt.cgi/applications/virt-manager--devel/rev/f9c2636a8a32

- Cole